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Phys. Rev. C 71, 034304 (2005) [6 pages]

Parity assignments in 172,174Yb using polarized photons and the K quantum number in rare earth nuclei

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D. Savran*, S. Müller, and A. Zilges
Institut für Kernphysik, Technische Universität Darmstadt, Schlossgartenstrasse 9, D-64289 Darmstadt, Germany

M. Babilon†
A. W. Wright Nuclear Structure Laboratory, Yale University, New Haven, Connecticut 06520

M. W. Ahmed, J. H. Kelley, A. Tonchev, W. Tornow, and H. R. Weller
Triangle Universities Nuclear Laboratory, Duke University, Durham, North Carolina 27708

N. Pietralla
Nuclear Structure Laboratory, Department of Physics & Astronomy, State University of New York at Stony Brook, Stony Brook, New York 11794-3800

J. Li, I. V. Pinayev, and Y. K. Wu
Free Electron Laser Laboratory, Department of Physics, Duke University, Durham, North Carolina 27708

Received 25 October 2004; published 8 March 2005

The 100% polarized photon beam at the high intensity γ ray source (HIγS) at Duke University has been used to determine the parity of six dipole excitations between 2.9 and 3.6 MeV in the deformed nuclei 172,174Yb in photon scattering (γ⃗,γ') experiments. The measured parities are compared with previous assignments based on the K quantum number that had been assigned in nuclear resonance fluorescence (NRF) experiments by using the Alaga rules. A systematic survey of the relation between γ-decay branching ratios and parity quantum numbers is given for the rare earth nuclei.

© 2005 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevC.71.034304
DOI:
10.1103/PhysRevC.71.034304
PACS:
21.10.Hw, 25.20.Dc, 27.70.+q

*E-mail address: savran@ikp.tu-darmstadt.de.

†Present address: Institut für Kernphysik, Technische Universität Darmstadt, D-64289 Darmstadt, Germany.

 
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